Improvement in adjustable reamers



E. H. ADGATE. ADJUSTABLE REAMER.

No 111,296. Patented M11131, 1871.

dumb tetra EDWIN H. ADGATE, OF MITTINEAGUE, MASSACHUSETTS.

Letters Patent No. 111,296, dated January 31, 1871.

IMPROVEMENT lN ADJUSTABLE REAMERS.

The Schedule referred to in theseI-etters Patent and making part of thesame.

I LllDWlX 1L Anuxru, of Mittincague, Hainpden county, State ofMassachusetts, have invented an Improved Adjustable lteamer, oiwhich'the'fiillowing is a specification.

Natzu'emul Objects of the I'm-cation.

My invention relates to forming a reamer of two or more cutters, set inslots inthe holder, radiating from its center, and in such a manner thata cone running the length of the reamer, through its center, can elevatethe cutters, or permit them to be depressed, screw-caps on the outsideof the reamer, projecting over the ends of the cutters, holding them inplace and in contact with the cone; and

The object of my invention is to form an adjustable reamer, that can hegraduated to thegreatest nicety to fit any sized hole.

I Descm'ption of the Accompanying Drawing.

Figure I is a sectional view of a reamer having three cutters.

Figure II is a view of one end of the reamer, showing the cap.

Gen-oral Description.

D is a cutter, working in a slot in the holder B or body of the reamcr,said slot radiating from the center of the reamer.

The cutters D are so formed that, while their outer or cutting-edges areparallel, the inner ones confonr to t-he cone S and are always incontact with it.

The cone rises from a spindle, L, that is provided beveled corners ofthe cutters, clamp them securely against the cone S.

In operation, the caps are screwedaway from thecutters, releasing them,when it is desired to increase the gauge of the cutting-power of thereamer; and,

by means of a wrench orby the fingers, the cone S is screwed against thecutters until they are driven out the required distance, when the caps PPare screwed over their beveled ends. When it is desired to reduce-thegauge it is not necessary to unscrew the caps'previon'sly.

Claim.

What I claim as my invention is-,

The combination of the cutters D D, cones, screwcaps l I, and body ofthe reamerB, having the neck T for the reception of the screw-end E ofthe cone, the parts being constructed and arranged substantially asshown and described.

EDWIN H. ADGATE. Witnesses:

R. F. HYDE, L. V. SMITH.

